[FlappyBird] Added delete best score functionnality

[Daihecyy]

Description

Added crud, endpoint and test for deleting FlappyBirdBestScore Need thorough reviewing (first PR)

Checklist

• [X] Created tests which fail without the change (if possible)
• [X] All tests passing
• [X] Extended the documentation, if necessary

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 81.55%. Comparing base (792d08c) to head (82dd4f1). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #602 +/- ## ======================================= Coverage 81.54% 81.55% ======================================= Files 128 128 Lines 9929 9934 +5 ======================================= + Hits 8097 8102 +5 Misses 1832 1832 ```

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[Daihecyy]

Fixed stupidity